Is it possible to develop a trigger so that a custom field that is filled with the aggregate of entries in a field of a related list? For example, for our contacts we have a related list of projects - each of these falls under 1 of 7 themes.  We would like to create a custom field that is automatically populated with all of the themes on any of the related projects, and then be able to add additional themes manually. Very new to cloud development so any help is appreciated!

Is it possible to develop a trigger so that a custom field that is filled with the aggregate of entries in a field of a related list? For example, for our contacts we have a related list of projects - each of these falls under 1 of 7 themes.  We would like to create a custom field that is automatically populated with all of the themes on any of the related projects, and then be able to add additional themes manually. Very new to cloud development so any help is appreciated!

Is it possible to develop a trigger so that a custom field that is filled with the aggregate of entries in a field of a related list? For example, for our contacts we have a related list of projects - each of these falls under 1 of 7 themes.  We would like to create a custom field that is automatically populated with all of the themes on any of the related projects, and then be able to add additional themes manually. Very new to cloud development so any help is appreciated!